DTE Energy updates a map of power outages in its service area every half hour on the 15 and 45. Look at this map for power outage details for Ann Arbor, Ypsilanti, and the rest of the DTE service area.

Interruptable air conditioning

If you have interruptable air conditioning service, there used to be status page for predicting if your air will be interrupted. (Note that this page is currently unreachable, after DTE scrambled their web site.)